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TECHNICAL PAPERS

Estimation of in Situ Elastic Properties of Biphasic Cartilage Based on a Transversely Isotropic Hypo-Elastic Model

[+] Author and Article Information
J. J. Garcia, N. J. Altiero, R. C. Haut

Department of Materials Science and Mechanics, College of Engineering and Orthopædic Biomechanics Laboratories, College of Osteopathic Medicine, Michigan State University, East Lansing, MI 48824

J Biomech Eng 122(1), 1-8 (Sep 01, 1999) (8 pages) doi:10.1115/1.429622 History: Received August 03, 1998; Revised September 01, 1999
Copyright © 2000 by ASME
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References

Figures

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Stress-stretch curves from the uniaxial solution with a constant coefficient a1=0.8 and different values for the coefficient n (0.020▴, 0.067▪, and 0.113♦): (a) equilibrium, (b) rapid loading. No differences are visible in the rapid loading curves. All curves have the same slope in the undeformed configuration.
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Stress-stretch curves from the uniaxial solution with a constant coefficient n=0.113 and different values for the coefficient a1 (0.8♦, 2.0▪, 3.0♦). All curves have the same slope in the undeformed configuration.
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Experimental force-stretch ratio curves obtained with the spherical indentor of 2 mm diameter showing the responses for rapid loading and equilibrium
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Comparison of stress and lateral displacement between the hypo-elastic and hyperelastic solutions for uniaxial loading
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Experimental values of Poisson’s ratio for cartilage determined by indentation with a flat, nonporous indentor assuming infinitesimal deformation of an isotropic, elastic solid phase
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Uniaxial stress-stretch curves obtained using the average properties from this study for rabbit retro-patellar cartilage. Observe the substantial contribution of water pressure to total stress in the rapid loading response.

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